Two stage air compressor pump

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Apr 20, 2004
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I have a Kobalt 80 gallon compressor. After replacing the reed valves and gaskets twice and having it go bad again, I am contemplating replacing the whole pump.

Any advice on a two stage pump? I was looking at THIS ONE but want to hear any other suggestions.
 
For $349 how can you go wrong?

My Quincy or Cambell Hausfeld will not match those numbers.

5 HP, 3 Cylinder, 2-Stage, air compressor pump with 22 CFM Displacement, 16 CFM @ 175 PSI, and 18 CFM @ 100 PSI. This unit has an SCFM @ 175 of 16. This is usable air or “free air” at pressure – 175 PSI. This pump can go to 200 PSI
 
Too bad you are not upstate NY, I have an extra 2 stage commercial pump that is currently tied to a 7.5 hp motor.

When it comes to compressors, a good pump makes all the difference. Plus they are so much quieter. I keep mine in my basement and have it piped outside
 
Rotary Screw.

Two stages are old, mang.

I just got a Quincy QGS-30 installed at the shop. It's the shiz. 95CFM at 100% duty cycle. Opened a 1/4 drain and it held 102# without a glitch. very quiet and vibration and maintenance free.
 
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Rotary Screw.

Two stages are old, mang.

I just got a Quincy QGS-30 installed at the shop. It's the shiz. 95CFM at 100% duty cycle. Opened a 1/4 drain and it held 102# without a glitch. very quiet and vibration and maintenance free.

For home use, the price of their least expensive rotary ($4225) would require a happy ending every time I walk by it.
 
Installed the new pump mentioned above.

Had to cobble together a cooper line from pump to tank sine the configuration was different. Also had to install a smaller pully to get correct rpms on pump.

Much quieter than previous pump and works better.

Rotary screw would be nice but I am just an ameatur.

Flicked from my phone and onto IH8MUD like a booger from my finger
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discharge line

I predict discharge tube failure.

Sweating copper is fine for hanging on the wall. As it rarely sees
high enough pressure/tempurature combination to reach failure.

If you have used Sched M it most likely isnt rated for that kind of pressure/temp

Schedual L is common. refrigeration guys have it. your local hose shop will have it.

The proper connections for that are Flare and Compression

Good luck
 
we never used anything but sched L copper

In the field I have seen peeps use 2 wire hydraulic hose
this ends of turning into goo from the heat and oil not a good choice.

I have seen 1 unit in my 10 year career that had a braided hose on it. But doubt it was teflon core as that isnt likely to withstand the heat at pressure.

my suggestion would be to install a 90deg elbow in the top of the tank. May require a check valve change.
and a 90 on the aftercooler of the compressor this will allow you to bend a U shaped tube.

If you install the 90s and measure the spread of the center of your holes. and the diameter of the tube you require, most hose shops can bend a tube for you.
 
The copper discharge tube helps cool the air some.
 
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